Mohamed Salah has been a revelation since joining Liverpool from Roma in the summer.
The Egyptian already has 12 goals in just 17 appearances for the Reds, including five in six in the Champions League.
He looks to be worth every penny of the £37m Liverpool shelled out for his services, which at the time was a club record, before Naby Keita's pending move was agreed.
Salah has become an integral part of the frightening 'fab four', alongside Philippe Coutinho, Roberto Firmino and Sadio Mane.
Mane and Salah teamed up to blitz West Ham on the counter-attack for Liverpool's opener in their 4-1 win, breaking from a corner to score in just over 13 seconds.
The 25-year-old's form has meant it is now even more puzzling that he struggled so much during his spell at Chelsea.
He moved to Stamford Bridge in January 2014 for £11m from Swiss side Basel, but only played 19 times and found the net twice in a year, before he was loaned to Fiorentina and then Roma, and signed permanently for the latter in 2016.
Salah was red-hot in Serie A, scoring 29 goals in 65 matches, and was Jurgen Klopp's top priority for his summer recruitment.
Frank Lampard played with Salah for half a season at Chelsea, and he believes the reason it didn't work out for him in West London was that he wasn't ready for such a big move.
"It was huge move at that stage of his career, maybe it was a bit early for a club like Chelsea," he said on BT Sport, per the Metro.
"It wasn’t easy and he was up against the likes of [Eden] Hazard, Oscar and [Juan] Mata was around there in his early days.
"So it was tough for him to come in then and he probably wasn’t quite ready for it."
However, Lampard added that the Egyptian is now reaping the rewards of moving away in search of regular football.
He thinks he has re-discovered his confidence, and that he is a world away from the player Chelsea signed almost four years ago.
"The good thing for him is he’s gone away and come on leaps and bounds," he stated.
"He’s got confidence and personality now that he maybe didn’t have when he was young. But he always had the speed and the touch.
"But he’s a completely different player to what he was at Chelsea and it is complete credit to him for that."